In-game screenshot. Trailblazer had different colors for level properties. You could be stuck on the floor, go faster, and so on.

I never owned this game, nor any machine capable of running it, but
I played it a lot during a trip to Ireland. It was IMHO one of the
best games for 8-bit computers, with a very basic machine, the authors
managed to make something really fun, with an excellent gameplay,
and you could play it for hours. So did I...